Baseball key



FIG. 1 is a top perspective view of my new design for a baseball key;

FIG. 2 is a top plan view of my new invention;

FIG. 3 is a bottom plan view of my new invention;

FIG. 4 is a left side elevation view of my new invention;

FIG. 5 is a right side elevation view of my new invention;

FIG. 6 is a front elevation view of my new invention; and,

FIG. 7 is a rear elevation view of my new invention.

The broken lines indicating baseball items are for purposes of illustrating an optional design and form no part of the claimed design. 

CLAIM The ornamental design for a baseball key, as shown and described. 